Juniper JN0-281 Exam - Topic 5 Question 10 Discussion

Actual exam question for Juniper's JN0-281 exam

Question #: 10
Topic #: 5

[All JN0-281 Questions]

MACsec provides protection against which two types of threats? (Choose two.)

AData decryption

BPlayback attacks

CHashing attacks

DMan-in-the-middle attack

Show Suggested Answer

Suggested Answer: B, D

MACsec (Media Access Control Security) provides data confidentiality, integrity, and origin authenticity at Layer 2, protecting against several types of threats.

Step-by-Step Breakdown:

Man-in-the-Middle Attack Protection:

MACsec encrypts traffic at Layer 2, preventing man-in-the-middle attacks where an attacker intercepts and manipulates traffic between two communicating devices. Since the data is encrypted, any intercepted packets are unreadable.

Protection Against Playback Attacks:

MACsec also protects against playback attacks by using sequence numbers and timestamps to ensure that old, replayed packets are not accepted by the receiver.

Juniper Reference:

MACsec Configuration: Juniper devices support MACsec for securing Layer 2 communications, ensuring protection against replay and man-in-the-middle attacks in sensitive environments.

by Katlyn at Jul 13, 2025, 04:42 PM

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Leslie

5 months ago

I thought hashing attacks were a bigger concern.

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Loreen

5 months ago

Totally agree, those are the main threats!

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Joseph

6 months ago

Wait, does it really cover man-in-the-middle? I thought it was just for data integrity.

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Luis

6 months ago

Yup, definitely those two!

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Art

6 months ago

MACsec protects against playback attacks and man-in-the-middle attacks.

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Natalie

6 months ago

I’m confused about the options. I thought MACsec was more focused on encryption rather than directly preventing attacks like hashing.

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Dorothy

7 months ago

I practiced a similar question, and I think the correct answers are playback attacks and man-in-the-middle attacks. That sounds right to me.

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Lyndia

7 months ago

I'm not entirely sure, but I feel like hashing attacks might not be one of them. I recall something about data integrity, but it's fuzzy.

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Antione

7 months ago

I think MACsec protects against man-in-the-middle attacks and maybe playback attacks? I remember those being mentioned in the study materials.

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Curt

7 months ago

I remember learning about MACsec in class, and I believe it's designed to prevent data decryption and man-in-the-middle attacks. Those seem like the most relevant options here.

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Goldie

7 months ago

Okay, let's think this through. MACsec is all about securing the data link layer, so it should protect against threats like man-in-the-middle attacks and playback attacks. I'm going to go with those two.

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Reita

7 months ago

Hmm, this is a tricky one. I think the key is to focus on the core purpose of MACsec, which is to provide data integrity and confidentiality. So the two threats it protects against are likely related to those goals.

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Izetta

8 months ago

I'm pretty sure MACsec protects against data decryption and playback attacks, but I'm not 100% certain about the other options.

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Denny

10 months ago

I'm not sure about hashing attacks, but I know for sure that MACsec is effective against data decryption.

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Gianna

10 months ago

Hashing attacks? Really? Who even thinks of that? B and D, all the way. Anything else is just a figment of someone's imagination.

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Junita

8 months ago

I agree, B and D are the main threats we need to protect against.

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Reita

10 months ago

B and D, without a doubt. If you can't protect against playback and man-in-the-middle, what's the point of even having MACsec? Might as well just use a tin can and string.

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